Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with ananimated graphical user interface showing a first image of the claimeddesign; and,

FIG. 2 is a second image thereof.

The outermost broken-line border shown in FIGS. 1 and 2 illustrates theperimeter of a display screen or a portion thereof, as well as theboundary of the claimed design and forms no part of the claimed design.The remaining broken lines illustrate portions of a graphical userinterface and form no part of the claimed design. The appearance of theanimated images sequentially transitions between the images shown inFIGS. 1 and 2 . The process or period in which one image transitions toanother forms no part of the claimed design.

CLAIM We claim the ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 